Chapter 8 - Graphing Quadratic Functions - 8.1 - Graphing f(x) = ax^2 - Communicate Your Answer - Page 419: 2

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Graph of $f(x)=ax^2$ is a parabola with the vertex at the origin. If $a$ is positive parabola opens up and if $a$ negative parabola opens down. Also when $a$ is increasing, parabola becomes narrower and when decreasing, parabola becomes wider.